1. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

2. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

3. Who invented Hydrogen bomb ?

Answer:

Edward Teller

4. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

5. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

6. Who invented Radiocarbon ?

Answer:

Willard Libby

7. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712